import os

class Config:
    SECRET_KEY = os.getenv('SECRET_KEY', 'default_secret_key')
    SQLALCHEMY_DATABASE_URI = os.getenv('DATABASE_URL', 'sqlite:///app.db')
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    UPLOAD_FOLDER = './uploads'
    STATIC_FOLDER = './static'
    OUTPUT_FOLDER = './output_file'